startmail.com

Observed Jul 18, 2026, 13:53 UTC (8h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onRoutit

Email byZendesk

Secured byLet's Encrypt

Registered withHosting Concepts B.V. d/b/a Registrar.eu

Also usesGoogle Search Console

IPv6 · 9 subdomains · tranco_40k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat startmail.com actually stands on - every host below is a signed observation

startmail.com

A / AAAA

145.131.90.136145.131.90.1522a02:22a0:bbb6:1d00::1001:4432a02:22a0:bbb6:1d00::1002:443

Routitserves the site

dns31.cloudns.netdns32.cloudns.netdns33.cloudns.netdns34.cloudns.net

cloudns.netanswers its DNS

mx1.startmail.commx2.startmail.commx3.startmail.commx4.startmail.com

Zendeskreceives its email

TLS

startmail.com

Let's Encryptissued its certificate

DNS Records

A 2

145.131.90.136
145.131.90.152

AAAA 2

2a02:22a0:bbb6:1d00::1001:443
2a02:22a0:bbb6:1d00::1002:443

MX 4

10mx1.startmail.com
10mx2.startmail.com
20mx3.startmail.com
30mx4.startmail.com

TXT 5

v=spf1 include:spf.startmail.com include:mail.zendesk.com ~all
google-site-verification=C657dqp16Y0cGcLHCmZHmMsaaIVeprybtgiRi_DukZE
google-site-verification=p92r087LlIf2FNd7HXto_b9YGxOJ7kZgzctnVDneKxI
v=DMARC1; p=quarantine; sp=quarantine; adkim=r; aspf=r; pct=100
v=STSv1; id=2023100501

NS 4

dns31.cloudns.net
dns32.cloudns.net
dns33.cloudns.net
dns34.cloudns.net

SOA 1

dns31.cloudns.net support.cloudns.net

SRV 2

imap.startmail.com:993 p0
smtp.startmail.com:465 p0

CAA 3

iodef "mailto:root@startmail.com"
issue "letsencrypt.org"
issuewild "letsencrypt.org"

TLS Certificates (3)

Common Name	Issuer	Expires
`startmail.com`	C=US, O=Let's Encrypt, CN=YR2	Sat, 29 Aug 2026 16:11:39 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (9)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for startmail.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/startmail.com">
  <img src="https://domaindrift.io/badge/startmail.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for startmail.com">
</a>

Ed25519 Receipt

Receipt ID: 3f6348e8-3af5-4829-a8a6-108c5f89ae57
Output Hash: edb20702672b2658f15fa9a3446931cb0e0b04871ddc20ea3e2c474ceed5162b
Signature: ed25519:9153f9d0a302668ae80a9ae0006e513555750f97b18da4f428d610707b88c5c7257888d9a60344ae487570b74f8ba1e99d8d5dbbb621a444eaf31fe99399670d
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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